Old Project Avalon Forum (ARCHIVE) - View Single Post

Swami · 01-25-2010, 04:43 PM

NASA Images Earth Sized Spherical Objects Inside Corona of SUN
I have written to a Mr. Joseph Gurman at NASA asking for an explanation to all this, you can read his reply below, he states these anomalies are, quote " Compression artifacts, highly magnified". That sounds very plausible especially coming from a NASA scientists, one big problem with Mr. Gurman's explanation though, if these spheres are compression artifacts, why then did they only start appearing on the 17th of January this year, they would have been there since the first day SOHO began sending photo's back to Earth!

Here is the e-mail

Hi, Mr. Walton -

Compression artifacts, highly magnified. The images you are looking at are "space weather beacon mode" images that are telemetered down nearly continuously:

http://stereo-ssc.nascom.nasa.gov/be...coverage.shtml

in near-realtime, and are both binned (undersampled spatially) and heavily, lossily compressed digitally onboard (analogous to the various JPEG compression setting son a digital camera, but much more severe). Usually, by now (that is, three days or more after the data were obtained), we'd have the full-resolution (2048 x 2048) images, which are much less heavily, but still lossily, compressed, and are played back to a Deep Space Network (DSN) ground station via the high-gain antenna on one of the STEREO spacecraft. Unfortunately, a piece of ground hardware at DSN failed, and we're only slowly catching up on data from January 18 onward --- except the lower-resolution (256 x 256 or 512 x 512) beacon mode data.

The compression artifacts are particularly obvious when a particle (cosmic ray or solar energetic, charged particle) hits the CCD detector on the spacecraft. The compression scheme has a hard time mathematically representing sharp, single or few-pixel features, and you get a characteristic pattern of a bright dot in the middle of a compression block (a subsection of the image) surrounded by a pattern of dark dots.

Best,

Joe Gurman

(Dr.) Joseph B. Gurman
STEREO Project Scientist

http://gazbom.blogspot.com/2010/01/n....html#comments

01-25-2010, 04:43 PM	#118
Swami Avalon Senior Member Join Date: Dec 2009 Posts: 165	Re: ufo's near the sun NASA Images Earth Sized Spherical Objects Inside Corona of SUN I have written to a Mr. Joseph Gurman at NASA asking for an explanation to all this, you can read his reply below, he states these anomalies are, quote " Compression artifacts, highly magnified". That sounds very plausible especially coming from a NASA scientists, one big problem with Mr. Gurman's explanation though, if these spheres are compression artifacts, why then did they only start appearing on the 17th of January this year, they would have been there since the first day SOHO began sending photo's back to Earth! Here is the e-mail Hi, Mr. Walton - Compression artifacts, highly magnified. The images you are looking at are "space weather beacon mode" images that are telemetered down nearly continuously: http://stereo-ssc.nascom.nasa.gov/be...coverage.shtml in near-realtime, and are both binned (undersampled spatially) and heavily, lossily compressed digitally onboard (analogous to the various JPEG compression setting son a digital camera, but much more severe). Usually, by now (that is, three days or more after the data were obtained), we'd have the full-resolution (2048 x 2048) images, which are much less heavily, but still lossily, compressed, and are played back to a Deep Space Network (DSN) ground station via the high-gain antenna on one of the STEREO spacecraft. Unfortunately, a piece of ground hardware at DSN failed, and we're only slowly catching up on data from January 18 onward --- except the lower-resolution (256 x 256 or 512 x 512) beacon mode data. The compression artifacts are particularly obvious when a particle (cosmic ray or solar energetic, charged particle) hits the CCD detector on the spacecraft. The compression scheme has a hard time mathematically representing sharp, single or few-pixel features, and you get a characteristic pattern of a bright dot in the middle of a compression block (a subsection of the image) surrounded by a pattern of dark dots. Best, Joe Gurman (Dr.) Joseph B. Gurman STEREO Project Scientist http://gazbom.blogspot.com/2010/01/n....html#comments